LH,
I do. We are separated by about 350 miles and a couple states - I have primary physical custody. Their dad chose to move out of state before we were actually divorced to take a job.
Kids (2 boys - 8 and 10 at the time of the divorce, 11 and 13 now) travel to see their Dad one wknd/month (by cheap airfare if we can get it) and we alternate paying for the tickets. Our original parenting plan allows him two weekends per month - one in our city, and one at his home, but after his OW/now wife moved from our town to join him, he no longer visits as often because it is more inconvenient and expensive for him I guess. While we alternate paying for the kids tickets, he is responsible for his own expenses when he visits here.
In the summer the kids spend about 6 weeks there. We discuss the weekend schedule at the beginning of each school year, and the summer schedule usually by April each year. The parenting plan specifies alternate years for the big school holidays (e.g. In a given school year, one of us has them winter break, and the other for spring break) and we also alternate Thanksgiving.
Ex-H tries to come to their "big events" related to school, music, sports in town when he can. I and the kids try to keep him informed of all recitals, performances, game schedules, etc.
We have joint legal custody and coordinate on decisions about school, etc. We actually cooperate pretty well - and in most cases Ex-H expresses his wishes,thoughts, which I try to accomodate - he also generally defers to me on the final decisions since I am mainly responsible for the implementation.
Overall, I think it has been a very successful plan. With the caveat that it gets very expensive shuttling kids back and forth - we both agree it is important though. And also, I believe my kids would benefit if their dad lived closer and they could see him more. They communicate a lot by e-mail now that they are older. But it is not the same. They have adjusted pretty well though.
Let me know if I can provide any more info.
SP